He/she should have read before ordering ! This is your choice to offer extra or not. Maybe you can do it as it is your first buyer and you want to get a great review, but be careful because extras cost you time, so don’t give too many for free !

Just give him source file what you are going to do with that? Nothing
But you’ll surely improve your chances getting a 5 star review will be a good start
Even i threw 2 source files when i started selling

Just send it over to him… Inform him first that he ordered the wrong GIG BUT let him know that you will give it to him for free because he is a first time customer.

It is more than likely that they will be a repeat customer and they will refer people to you. So I’d just go along with it but first inform them that you are providing the service at no extra charge to them.

Hello, if you want extra for source file then you can convince buyer, if buyer agree to pay then you can send custom offer for your buyer, but if buyer not agree to pay and ask vector source file then i suggest you can give, because you are new here so you mostly need feedback rating from buyers.